Yes, there's many ways JPG can be interleaved. Your example was probably specially encoded in sequential JPG compression instead of progressive.
"..There are tens of thousands different ways to produce progressive
JPEGs, "progressive" is definitely not restricted to a single
predefined way. For instance JPEGrescan conducts trials with different
progressive configurations to reduce the file size, yes progressive
JPEGs are often smaller than sequential ones. Even what is often
called "baseline JPEG" ("sequential" is more appropriate) could be
recorded in 13 different ways. 99.99% of sequential JPEGs use the
single scan with 3 interleaved components scheme therefore JSK will
only output a single scan_001.jpg file when it encounters one of these
numerous sequential JPEG (it's not a bug, it's a sequential JPEG).
JSK produces between 1 and 3 scan images when the input file was a
sequential JPEG, 4 scan images and more mean the input file was a
Image below has a progressive JPG on the left and sequential on the right:
Source: This site below explains in more details and with more examples how this can be achieved:
It's often used for very detailed and heavy JPG. It was a bit more popular for regular web images in the 90' because of the slow modems.
If you save a JPG in Photoshop (and not a "save for web") you will notice the last option is "progressive" and lets you choose how many scans you want.
But for your image sample, it was probably done using a special JPG codec.
If you want to read more about it: